Big press X here, no way maintaining all those colleges would cost this much, facilities alone would take more than that, not to mention personnel.
And even if that was the case, it would be meaningless.
In the trillions high tax collection the USA makes, 13 billion is a drop in the bucket, that would mean a ignorable amount of money in a larger budget situation. Think like this, you make about 80K a year, and you have your budget all figured out, would some extra 200 bucks make a major difference on your plans, or even perceive the extra 200?
So if the issue is that you can't keep community college with the trillions dollar budget you have right now, you wouldn't be able to do the same with a couple of billion more, it would just get lost on the numbers.
Also, the college problem people have right now on the USA ain't the community colleges, but the student loans people take to go into over priced private colleges to get degrees they can't get a job over in order to to pay those debts, and according to the most recent numbers on google, the student debt is
$1.57 trillion bucks. You could tax the billionaires a 100% of their income and whatever gain their stocks go for, and it wouldn't make a dent on the true problem.